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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-24 04:52:22 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-24 04:52:22 +0000
commit3d08cd331c1adcf0d917392f7e527b3f00511748 (patch)
tree312f0d1e1632f48862f044b8bb87e602dcffb5f9 /man3/getnetent_r.3
parentAdding debian version 6.7-2. (diff)
downloadmanpages-3d08cd331c1adcf0d917392f7e527b3f00511748.tar.xz
manpages-3d08cd331c1adcf0d917392f7e527b3f00511748.zip
Merging upstream version 6.8.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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-'\" t
-.\" Copyright 2008, Linux Foundation, written by Michael Kerrisk
-.\" <mtk.manpages@gmail.com>
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.TH getnetent_r 3 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-getnetent_r, getnetbyname_r, getnetbyaddr_r \- get
-network entry (reentrant)
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <netdb.h>
-.P
-.BI "int getnetent_r(struct netent *restrict " result_buf ,
-.BI " char " buf "[restrict ." buflen "], size_t " buflen ,
-.BI " struct netent **restrict " result ,
-.BI " int *restrict " h_errnop );
-.BI "int getnetbyname_r(const char *restrict " name ,
-.BI " struct netent *restrict " result_buf ,
-.BI " char " buf "[restrict ." buflen "], size_t " buflen ,
-.BI " struct netent **restrict " result ,
-.BI " int *restrict " h_errnop );
-.BI "int getnetbyaddr_r(uint32_t " net ", int " type ,
-.BI " struct netent *restrict " result_buf ,
-.BI " char " buf "[restrict ." buflen "], size_t " buflen ,
-.BI " struct netent **restrict " result ,
-.BI " int *restrict " h_errnop );
-.P
-.fi
-.RS -4
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.RE
-.P
-.BR getnetent_r (),
-.BR getnetbyname_r (),
-.BR getnetbyaddr_r ():
-.nf
- Since glibc 2.19:
- _DEFAULT_SOURCE
- glibc 2.19 and earlier:
- _BSD_SOURCE || _SVID_SOURCE
-.fi
-.SH DESCRIPTION
-The
-.BR getnetent_r (),
-.BR getnetbyname_r (),
-and
-.BR getnetbyaddr_r ()
-functions are the reentrant equivalents of, respectively,
-.BR getnetent (3),
-.BR getnetbyname (3),
-and
-.BR getnetbynumber (3).
-They differ in the way that the
-.I netent
-structure is returned,
-and in the function calling signature and return value.
-This manual page describes just the differences from
-the nonreentrant functions.
-.P
-Instead of returning a pointer to a statically allocated
-.I netent
-structure as the function result,
-these functions copy the structure into the location pointed to by
-.IR result_buf .
-.P
-The
-.I buf
-array is used to store the string fields pointed to by the returned
-.I netent
-structure.
-(The nonreentrant functions allocate these strings in static storage.)
-The size of this array is specified in
-.IR buflen .
-If
-.I buf
-is too small, the call fails with the error
-.BR ERANGE ,
-and the caller must try again with a larger buffer.
-(A buffer of length 1024 bytes should be sufficient for most applications.)
-.\" I can find no information on the required/recommended buffer size;
-.\" the nonreentrant functions use a 1024 byte buffer -- mtk.
-.P
-If the function call successfully obtains a network record, then
-.I *result
-is set pointing to
-.IR result_buf ;
-otherwise,
-.I *result
-is set to NULL.
-.P
-The buffer pointed to by
-.I h_errnop
-is used to return the value that would be stored in the global variable
-.I h_errno
-by the nonreentrant versions of these functions.
-.\" getnetent.3 doesn't document any use of h_errno, but nevertheless
-.\" the nonreentrant functions no seem to set h_errno.
-.SH RETURN VALUE
-On success, these functions return 0.
-On error, they return one of the positive error numbers listed in ERRORS.
-.P
-On error, record not found
-.RB ( getnetbyname_r (),
-.BR getnetbyaddr_r ()),
-or end of input
-.RB ( getnetent_r ())
-.I result
-is set to NULL.
-.SH ERRORS
-.TP
-.B ENOENT
-.RB ( getnetent_r ())
-No more records in database.
-.TP
-.B ERANGE
-.I buf
-is too small.
-Try again with a larger buffer
-(and increased
-.IR buflen ).
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface Attribute Value
-T{
-.na
-.nh
-.BR getnetent_r (),
-.BR getnetbyname_r (),
-.BR getnetbyaddr_r ()
-T} Thread safety MT-Safe locale
-.TE
-.SH VERSIONS
-Functions with similar names exist on some other systems,
-though typically with different calling signatures.
-.SH STANDARDS
-GNU.
-.SH SEE ALSO
-.BR getnetent (3),
-.BR networks (5)